Is there a way to get directions(just routes) using google for mkmapview?

Question

I\'m using swift on iOS and using MKMapView. I\'ve been working on giving a user a from - to textfield and letting the user have a form of route between the from and to loca

Answer 1

I think this Stackoverflow answer can convert the encoded polyline to MKPolyline.

The answer is an Objective-C version, so I tried to convert it to Swift, sample code:

func polyLineWithEncodedString(encodedString: String) -> MKPolyline {
        let bytes = (encodedString as NSString).UTF8String
        let length = encodedString.lengthOfBytesUsingEncoding(NSUTF8StringEncoding)
        var idx: Int = 0

        var count = length / 4
        var coords = UnsafeMutablePointer.alloc(count)
        var coordIdx: Int = 0

        var latitude: Double = 0
        var longitude: Double = 0

        while (idx < length) {
            var byte = 0
            var res = 0
            var shift = 0

            do {
                byte = bytes[idx++] - 0x3F
                res |= (byte & 0x1F) << shift
                shift += 5
            } while (byte >= 0x20)

            let deltaLat = ((res & 1) != 0x0 ? ~(res >> 1) : (res >> 1))
            latitude += Double(deltaLat)

            shift = 0
            res = 0

            do {
                byte = bytes[idx++] - 0x3F
                res |= (byte & 0x1F) << shift
                shift += 5
            } while (byte >= 0x20)

            let deltaLon = ((res & 1) != 0x0 ? ~(res >> 1) : (res >> 1))
            longitude += Double(deltaLon)

            let finalLat: Double = latitude * 1E-5
            let finalLon: Double = longitude * 1E-5

            let coord = CLLocationCoordinate2DMake(finalLat, finalLon)
            coords[coordIdx++] = coord

            if coordIdx == count {
                let newCount = count + 10
                let temp = coords
                coords.dealloc(count)
                coords = UnsafeMutablePointer.alloc(newCount)
                for index in 0..

You can try the sample project from this GitHub link.

Below is the image of using Google Direction API web service to render a route on MKMapView from San Francisco to San Jose.